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is this SID unique for this server only or throughout the domain?
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is this SID unique for this server only or throughout the domain?

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when there exists sid in sysdatabases for a database, but suser_sname(sid) is coming as NULL. is there any history of the SID to check to whom this SID belonged?<br />
<br />
thanks
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when there exists sid in sysdatabases for a database, but suser_sname(sid) is coming as NULL. is there any history of the SID to check to whom this SID belonged?

thanks

sid exists but not suser_sname(sid)

Microsoft SQL Server is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.SQL Server is available in multiple versions, typically identified by release year, and versions are subdivided into editions to distinguish between product functionality. Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning.